Overview

The ASSR-32XX Solid State Relays (SSRs) consist of an AlGaAs infrared light-emitting diode (LED) input stage optically coupled to a high-voltage output detector circuit. The detector consists of a high-speed photovoltaic diode array and driver circuitry to switch on/off two discrete high voltage MOSFETs. The relay turns on (contact closes) with a minimum input current of 3mA through the input LED. The relay turns off (contact opens) with an input voltage of 0.8V or less.

The single channel configurations, ASSR-3210 and ASSR-3211, are equivalent to 1 Form A Electromechanical Relays (EMR), and the dual channel configuration, ASSR-3220, is equivalent to 2 Form A EMR. They are available in 4-pin SO, 6-pin DIP, 8-pin DIP and Gull Wing Surface Mount for DIP packages. Their electrical and switching characteristics are specified over the temperature range of -40°C to 85°C. They are used for general purpose switching of signals and low power AC/DC loads.

Industrial communication includes data monitoring and processing, diagnostic and sensing as well as visualization. To maintain data integrity against group loop current or common mode noise, optocouplers are used to eliminate both problems.

The Solid State Relay (SSR) is a solid-state replacement of the electro-mechanical relay, and is commonly used for general purpose switching of signals and low power AC/DC loads. It consists of a light-emitting diode (LED), a photo-sensitive FET driver and high-voltage MOSFETs.